Dynamic Design Analysis of a Foundation Undergoing Unequal Support Shock Motion

摘要

A design analysis method developed earlier for small shipboard foundations is extended to those cases where the foundation supports experience unequal levels of shock excitation. The method utilizes an energy criterion such that the foundation may remain elastic or may experience elastic-plastic behavior in such a way as to insure against large deflections or unwanted collapse. Predicted load carrying capacity levels are developed for a sample foundation undergoing unequal support motion. In addition, results are compared with these obtained earlier for equal levels of shock excitation of the foundation supports. The results are worked up in detail, both theoretically and by numerical examples to show the ease of application and efficiency of the method. (Author)